Table 2. Final multiple regression models for habitat composition prediction of probability of population membership for eastern chipmunks collected in northern Indiana after stepwise selection.
Width | Variable | Estimate | Std. Error | Upper 95% CI | Lower 95% CI | Pr|z| > 0 | Adjusted R2 | Model p-value |
---|---|---|---|---|---|---|---|---|
3m | 0.150 | 0.028 | ||||||
Intercept | 0.627 | 0.001 | 0.629 | 0.626 | <0.001 | |||
Forest | 0.211 | 0.001 | 0.213 | 0.209 | 0.025 | |||
NTC | 1.650 | 0.004 | 1.657 | 1.643 | 0.058 | |||
Grassland | 0.812 | 0.001 | 0.814 | 0.809 | 0.117 | |||
10m | 0.127 | 0.013 | ||||||
Intercept | 0.923 | 0.001 | 0.924 | 0.922 | <0.001 | |||
Forest | 0.272 | 0.001 | 0.273 | 0.270 | 0.024 | |||
NTC | 1.622 | 0.004 | 1.630 | 1.615 | 0.053 | |||
Grassland | 0.819 | 0.822 | 0.817 | 0.002 | 0.119 | |||
Water | -0.840 | 0.002 | -0.835 | -0.844 | 0.086 | |||
25m | 0.143 | 0.009 | ||||||
Intercept | 0.929 | 0.001 | 0.931 | 0.927 | <0.001 | |||
Forest | 0.266 | 0.001 | 0.268 | 0.265 | 0.028 | |||
NTC | 1.846 | 0.005 | 1.856 | 1.837 | 0.081 | |||
Grassland | 0.837 | 0.001 | 0.840 | 0.834 | 0.048 | |||
Water | -0.876 | 0.003 | -0.870 | -0.883 | 0.077 | |||
50m | 0.158 | 0.005 | ||||||
Intercept | 0.943 | 0.001 | 0.944 | 0.942 | <0.001 | |||
Forest | 0.219 | 0.001 | 0.220 | 0.218 | 0.063 | |||
NTC | 1.641 | 0.023 | 1.687 | 1.595 | 0.099 | |||
Grassland | 1.018 | 0.001 | 1.021 | 1.015 | 0.012 | |||
Water | -0.944 | 0.002 | -0.940 | -0.948 | 0.053 | |||
100m | 0.147 | 0.007 | ||||||
Intercept | 0.919 | 0.001 | 0.920 | 0.918 | <0.001 | |||
Forest | 0.245 | 0.001 | 0.246 | 0.244 | 0.040 | |||
NTC | 1.784 | 0.003 | 1.790 | 1.777 | 0.082 | |||
Grassland | 0.930 | 0.001 | 0.932 | 0.928 | 0.011 | |||
Water | -0.758 | 0.002 | -0.755 | -0.761 | 0.109 | |||
200m | 0.186 | 0.004 | ||||||
Intercept | 1.070 | 0.001 | 1.072 | 1.068 | <0.001 | |||
NTC | 2.387 | 0.007 | 2.400 | 2.373 | 0.089 | |||
Grassland | 1.375 | 0.002 | 1.379 | 1.371 | 0.002 | |||
TC | -2.793 | 0.007 | -2.779 | -2.807 | 0.027 | |||
Water | -0.789 | 0.002 | -0.785 | -0.793 | 0.097 | |||
400m | 0.206 | 0.001 | ||||||
Intercept | 1.058 | 0.001 | 1.059 | 1.057 | <0.001 | |||
NTC | 3.410 | 0.009 | 3.429 | 3.392 | 0.014 | |||
Grassland | 1.418 | 0.002 | 1.421 | 1.415 | 0.001 | |||
TC | -4.391 | 0.006 | -4.380 | -4.402 | 0.002 | |||
1000m | 0.074 | 0.025 | ||||||
Intercept | 1.068 | 0.002 | 1.071 | 1.064 | <0.001 | |||
Grassland | 0.990 | 0.002 | 0.993 | 0.986 | 0.005 |
All metrics were calculated via 1000 bootstrap iterations (average across 1000 iterations or 95% confidence intervals around beta estimates). Each segment width includes the selected variables, coefficient estimates, standard errors, 95% confidence intervals, p-values for each parameter, model adjusted R2, and p-value of the overall model. Variables that had an average p-value < 0.05 are given in bold. Note: NTC = non-treed corridors and TC = treed corridors.